The April Fools (1969)

Storyline : In New York, the newly-promoted in the Street Broker Howard Brubaker is
invited by his boss Ted Gunther to come to his fancy apartment. However,
there is a party and the clumsy Howard feels uncomfortable and
misplaced. Ted's wife Catherine Gunther is amused with Howard and he
invites her to have a drink in a club that Ted has suggested. Howard has
a loveless marriage and his wife Phyllis does not pay attention to him.